Aryna Sabalenka's bid for a first French Open title was left in tatters as she fell apart in a bizarre defeat by Russian 25th seed Diana Shnaider in the quarter-finals on Wednesday. The world number one led by a set and a double-break before exiting the tournament in a blaze of unforced errors, collapsing to a 3-6, 7-5, 6-0 loss in blustery conditions on Court Philippe Chatrier. Shnaider will face Polish qualifier Maja Chwalinska in the semi-finals on Thursday.